Abstract
With few exceptions, white oaks (subg. Quercus) and red oaks (subg. Erythrobalanus), as well as species belonging to the subg. Cyclobalanopsis and subg. Protobalanus were resistant or tolerant to artificial inoculation with the common root-knot nematodes {Meloidogyne arenaria- two races, M. hapla, M. Incognita, M.javanica). However, all four species of subg. Cerris tested were susceptible to at least one of these nematodes. The oak root-knot nematode (M. querciana), reported only from Virginia, was successful in parasitizing all 10 red oaks tested and one or more of the species in the other four subgenera. The galls produced by this nematode appeared to be concentrated on shallow roots, which might facilitate their observation in the field.
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